"show-nat-rulebase" returning empty "Manual Lower Rules"

WHAT AM I TRYING TO DO:I am trying to document the NAT rules, so I created a python script using web API v1.1 to query an 80.10 checkpoint cluster.

PROBLEM:The "show-nat-rulebase" web API call is returning empty "Manual Lower Rules" rulebase when there is a large number of manual rules created (more than 3000)I've tested the same in a lab environment with 100 NAT rules and the "show-nat-rulebase" works as expected.